InvalidArgumentException on requests to "/login/keep-alive" after applying the 2.2.16 security fix

[Steffen]

I've just applied the security fix (no full upgrade to 2.2.16 yet) and now this error is logged every few seconds.

InvalidArgumentException: Class does not match formatter pattern %s\%s\View\%s src/XF.php:1135
Generated by: Unknown account Jun 5, 2024 at 6:03 PM

Stack trace
Code:

#0 src/XF/App.php(1701): XF::stringToClass('', '%s\\%s\\View\\%s', 'Pub')
#1 src/XF/Container.php(234): XF\App->XF\{closure}('', Array, Object(XF\Container))
#2 src/XF/Container.php(247)...

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InvalidArgumentException on requests to "/login/keep-alive" after applying the 2.2.16 security fix

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