In a comment troubleshooting Project entries for the Addon Manager in @ztlxltl 's FTV GitHub issues, the error messages that were pasted indicate a space (or other non-printable character) at the end of their Isotammi Project URL. The user probably picked up an extra character using copy’n’paste fro…

See PR #1981 PR #1991 pushed to 6.0 on 19 Feb 2025. It may be too late for gramps 6.0 though.

Leading/trailing white-space trimming in URLs for Addon Manager

emyoulation February 16, 2025, 2:46pm 2

In a related question…
Does the project editing validate for percent-encoding of Unicode in URLs? (urlencode ?)

What patches are 'vital' to your use of Gramps 5.1.x and 5.2.x?

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