A v9.1.3/php8.1 site log is showing: concrete/vendor/true/punycode/src/Punycode.php:84 The length of any one label is limited to between 1 and 63 octets, but 0 given.
The site is live with error reporting set to not show whoops report.
I am trying to track down the cause.
One possibility from forum archives is an incorrectly formed incoming URL. I have tested such and its not the cause in this case.
Weird - I also have this appearing in logs on 2 very separate v9 sites - I’ve never seen this error before (from memory at least!). It’s just started appearing in the last week on both sites.