Clicking Link from the More dialog in an issue results in a loading spinner that never completes

Atlassian Update – 7th March 2018 Hi everyone, I am happy to announce that we have addressed the issue starting with the 7.6.4 Server version. Please have a look at the Fix Version/s field for the list of subsequent versions that will include the fix as well. This flaw turned out to be a manifestation of a wider, cross-product problem. We have improved loading of the dialog in terms of reliability. At the same time, for that any such occurrences rely heavily on an actual Jira's configuration (e.g. installed plugins) and we were not able to test all the possible setups, an error dialog containing suggested workaround will be presented to a user shall the Link Issue dialog fail to render ever again. The workaround is https://confluence.atlassian.com/display/JIRAKB/JIRA+elements+fail+to+render+with+HTTP+400+error   it proved to be efficient every time it was applied. We will be also monitoring performance of the Link Issue dialog in order to assess whether further action is needed. Cheers, Pawel Drygas Developer, Jira Server