Error messages, missing features and changes that don't show: what they mean and how to fix them. · 15 articles
A button does nothing, an overlay never opens, a picker stays blank. These are JavaScript problems, and the browser console tells you which.
If impersonated browsing still appears online or updates last activity when using DigitalPoint/Cloudflare, update to Login As User 1.1.0 Patch Level 3 and check the suppression set...
The add-on is not in the list, requirements are not met, files have unexpected contents: the errors you are most likely to meet when installing, and the fix for each.
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