Closes #8967 prevent handling invalid requests in FilePicker

[Amejia481]

Details in #8967

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• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
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[Amejia481]

This is not a fix, it will prevent the crash, but some functionality could be broken for some pages, @csadilek and me were chatting about doing a follow up to do a permanent solution, I opened #8989 to continue the work.