If a concept uses the ampersand character (&) in its C_FULLNAME and/or C_DIMCODE (such as "\test\Procedures\CPT\Emergoing Technology, Services & Procedures\"), then any query that directly selects that concept fails due to "An error has occured while trying to run the query. The cell's message could not be interpreted as valid XML." The same query initiated from the workbench client works as expected.
A cursory investigation shows that the web client does not send the Query to the i2b2 server, and the cause appears to be that the ampersand character "&" may not be properly encoded into "&" during XML creation, thereby creating an invalid XML string. Or, perhaps a second layer of encapsulation is required to properly represent the ampersand character. I suspect that this error may also occur if other fields (C_NAME, C_COMMENT, etc) contain the ampersand character, but this has not been verified.
{"report":{"fcp":2396.9000000003725,"ttfb":1016.7999999988824,"pageVisibility":"visible","entityId":10029,"key":"jira.project.issue.view-issue","isInitial":true,"threshold":1000,"elementTimings":{},"userDeviceMemory":8,"userDeviceProcessors":16,"apdex":0.5,"journeyId":"ce6a73fb-bf75-4de1-876f-03992feefabd","navigationType":0,"readyForUser":2520.699999999255,"redirectCount":0,"resourceLoadedEnd":3121.4000000003725,"resourceLoadedStart":1044.9000000003725,"resourceTiming":[{"duration":814.0999999996275,"initiatorType":"link","name":"https://community.i2b2.org/jira/s/7fd763ecdf5ed1f47fc4d22fa8382e97-CDN/4x9nqn/820011/16zrvj4/49fa3aa3d35a2cc689cbf274e66cc41a/_/download/contextbatch/css/_super/batch.css","startTime":1044.9000000003725,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":1044.9000000003725,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":1859,"responseStart":0,"secureConnectionStart":0},{"duration":807,"initiatorType":"link","name":"https://community.i2b2.org/jira/s/898b8076c5e82f53cd816ca393e45a56-CDN/4x9nqn/820011/16zrvj4/f614b50eeb842ebd1ea7ab2903699907/_/download/contextbatch/css/project.issue.navigator,jira.view.issue,jira.global,atl.general,-_super/batch.css?jira.create.linked.issue=true&richediton=true","startTime":1056.7999999988824,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":1056.7999999988824,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":1863.7999999988824,"responseStart":0,"secureConnectionStart":0},{"duration":999.8000000007451,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/4c9c503fe98f210445831b0d7b0cdc33-CDN/4x9nqn/820011/16zrvj4/49fa3aa3d35a2cc689cbf274e66cc41a/_/download/contextbatch/js/_super/batch.js?locale=en-US","startTime":1058.699999999255,"connectEnd":1893.2999999988824,"connectStart":1866.199999999255,"domainLookupEnd":1058.699999999255,"domainLookupStart":1058.699999999255,"fetchStart":1058.699999999255,"redirectEnd":0,"redirectStart":0,"requestStart":1893.5,"responseEnd":2058.5,"responseStart":1917,"secureConnectionStart":1880.199999999255},{"duration":1011.9000000003725,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/694e598c1ae48b0f96655173631cd247-CDN/4x9nqn/820011/16zrvj4/f614b50eeb842ebd1ea7ab2903699907/_/download/contextbatch/js/project.issue.navigator,jira.view.issue,jira.global,atl.general,-_super/batch.js?jira.create.linked.issue=true&locale=en-US&richediton=true","startTime":1062.2999999988824,"connectEnd":1895.5,"connectStart":1868.4000000003725,"domainLookupEnd":1062.2999999988824,"domainLookupStart":1062.2999999988824,"fetchStart":1062.2999999988824,"redirectEnd":0,"redirectStart":0,"requestStart":1895.5999999996275,"responseEnd":2074.199999999255,"responseStart":1914.4000000003725,"secureConnectionStart":1882.4000000003725},{"duration":850.2999999988824,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/53f54e0ac3f00bb56b136b4d2fff2853-CDN/4x9nqn/820011/16zrvj4/aae1242f5fc81cc6a5bb8bc963ccda29/_/download/contextbatch/js/atl.global,-_super/batch.js?locale=en-US","startTime":1064,"connectEnd":1899.0999999996275,"connectStart":1871.5,"domainLookupEnd":1064,"domainLookupStart":1064,"fetchStart":1064,"redirectEnd":0,"redirectStart":0,"requestStart":1899.2999999988824,"responseEnd":1914.2999999988824,"responseStart":1913.4000000003725,"secureConnectionStart":1886.2999999988824},{"duration":1125.9000000003725,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/d41d8cd98f00b204e9800998ecf8427e-CDN/4x9nqn/820011/16zrvj4/1.0/_/download/batch/jira.webresources:calendar-en/jira.webresources:calendar-en.js","startTime":1066.0999999996275,"connectEnd":2175.199999999255,"connectStart":2102.699999999255,"domainLookupEnd":1066.0999999996275,"domainLookupStart":1066.0999999996275,"fetchStart":1066.0999999996275,"redirectEnd":0,"redirectStart":0,"requestStart":2175.699999999255,"responseEnd":2192,"responseStart":2191.199999999255,"secureConnectionStart":2152.199999999255},{"duration":1135.199999999255,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/d41d8cd98f00b204e9800998ecf8427e-CDN/4x9nqn/820011/16zrvj4/1.0/_/download/batch/jira.webresources:calendar-localisation-moment/jira.webresources:calendar-localisation-moment.js","startTime":1068.0999999996275,"connectEnd":2187.7999999988824,"connectStart":2115.4000000003725,"domainLookupEnd":1068.0999999996275,"domainLookupStart":1068.0999999996275,"fetchStart":1068.0999999996275,"redirectEnd":0,"redirectStart":0,"requestStart":2188,"responseEnd":2203.2999999988824,"responseStart":2202.5999999996275,"secureConnectionStart":2174.7999999988824},{"duration":819.6999999992549,"initiatorType":"link","name":"https://community.i2b2.org/jira/s/30748292e4ca68be6947d7969829384b-CDN/4x9nqn/820011/16zrvj4/4f66da484ef7d95a2a604d3ab014374c/_/download/contextbatch/css/jira.global.look-and-feel,-_super/batch.css","startTime":1069.5999999996275,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":1069.5999999996275,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":1889.2999999988824,"responseStart":0,"secureConnectionStart":0},{"duration":1135.199999999255,"initiatorType":"script","name":"https://community.i2b2.org/jira/rest/api/1.0/shortcuts/820011/766848d8ff8ea3676a80e44dfb51696a/shortcuts.js?context=issuenavigation&context=issueaction","startTime":1070.5999999996275,"connectEnd":2188.199999999255,"connectStart":2157.9000000003725,"domainLookupEnd":1070.5999999996275,"domainLookupStart":1070.5999999996275,"fetchStart":1070.5999999996275,"redirectEnd":0,"redirectStart":0,"requestStart":2188.4000000003725,"responseEnd":2205.7999999988824,"responseStart":2205.0999999996275,"secureConnectionStart":2175.199999999255},{"duration":866.8000000007451,"initiatorType":"link","name":"https://community.i2b2.org/jira/s/3ac36323ba5e4eb0af2aa7ac7211b4bb-CDN/4x9nqn/820011/16zrvj4/efa42a25652b26dfd802540c024826b3/_/download/contextbatch/css/com.atlassian.jira.projects.sidebar.init,-_super,-jira.view.issue,-project.issue.navigator/batch.css?jira.create.linked.issue=true&richediton=true","startTime":1138.5999999996275,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":1138.5999999996275,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":2005.4000000003725,"responseStart":0,"secureConnectionStart":0},{"duration":1197.7000000011176,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/8087506fefd02b4096991c90836b49f6-CDN/4x9nqn/820011/16zrvj4/efa42a25652b26dfd802540c024826b3/_/download/contextbatch/js/com.atlassian.jira.projects.sidebar.init,-_super,-jira.view.issue,-project.issue.navigator/batch.js?jira.create.linked.issue=true&locale=en-US&richediton=true","startTime":1138.7999999988824,"connectEnd":2318,"connectStart":2288.199999999255,"domainLookupEnd":1138.7999999988824,"domainLookupStart":1138.7999999988824,"fetchStart":1138.7999999988824,"redirectEnd":0,"redirectStart":0,"requestStart":2319.0999999996275,"responseEnd":2336.5,"responseStart":2334.199999999255,"secureConnectionStart":2302.4000000003725},{"duration":1748.5,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/d41d8cd98f00b204e9800998ecf8427e-CDN/4x9nqn/820011/16zrvj4/1.0/_/download/batch/jira.webresources:bigpipe-js/jira.webresources:bigpipe-js.js","startTime":1158.7999999988824,"connectEnd":2892.9000000003725,"connectStart":2865.4000000003725,"domainLookupEnd":1158.7999999988824,"domainLookupStart":1158.7999999988824,"fetchStart":1158.7999999988824,"redirectEnd":0,"redirectStart":0,"requestStart":2893,"responseEnd":2907.2999999988824,"responseStart":2906.699999999255,"secureConnectionStart":2879.7999999988824},{"duration":1954.2000000011176,"initiatorType":"script","name":"https://community.i2b2.org/jira/s/d41d8cd98f00b204e9800998ecf8427e-CDN/4x9nqn/820011/16zrvj4/1.0/_/download/batch/jira.webresources:bigpipe-init/jira.webresources:bigpipe-init.js","startTime":1167.199999999255,"connectEnd":3104.699999999255,"connectStart":3069.0999999996275,"domainLookupEnd":1167.199999999255,"domainLookupStart":1167.199999999255,"fetchStart":1167.199999999255,"redirectEnd":0,"redirectStart":0,"requestStart":3104.7999999988824,"responseEnd":3121.4000000003725,"responseStart":3120.0999999996275,"secureConnectionStart":3083.4000000003725},{"duration":774.2000000011176,"initiatorType":"xmlhttprequest","name":"https://community.i2b2.org/jira/rest/webResources/1.0/resources","startTime":2296.199999999255,"connectEnd":3051.4000000003725,"connectStart":3024.0999999996275,"domainLookupEnd":2296.199999999255,"domainLookupStart":2296.199999999255,"fetchStart":2296.199999999255,"redirectEnd":0,"redirectStart":0,"requestStart":3051.5,"responseEnd":3070.4000000003725,"responseStart":3069.699999999255,"secureConnectionStart":3038.0999999996275}],"fetchStart":0,"domainLookupStart":0,"domainLookupEnd":0,"connectStart":733,"connectEnd":990,"secureConnectionStart":961,"requestStart":990,"responseStart":1017,"responseEnd":1167,"domLoading":1023,"domInteractive":3141,"domContentLoadedEventStart":3141,"domContentLoadedEventEnd":3210,"domComplete":3800,"loadEventStart":3800,"loadEventEnd":3800,"userAgent":"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)","marks":[{"name":"bigPipe.sidebar-id.start","time":3124},{"name":"bigPipe.sidebar-id.end","time":3124.7999999988824},{"name":"bigPipe.activity-panel-pipe-id.start","time":3125},{"name":"bigPipe.activity-panel-pipe-id.end","time":3125.9000000003725},{"name":"activityTabFullyLoaded","time":3249.5999999996275}],"measures":[],"correlationId":"8ab0fe444f744f","effectiveType":"4g","downlink":10,"rtt":0,"serverDuration":163,"dbReadsTimeInMs":34,"dbConnsTimeInMs":42,"applicationHash":"0629dd8d260e3954ece49053e565d01dabe11609","experiments":[]}}