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PDF file attachment won't open in Acrobat, but will open in "Preview in Thurderbird" or if saved to disk

Thunderbird Přiwěški
nsolot wotmołwjeny
nsolot
nsolot

PDF file attachments were working fine and now they don't.

I get no error message, but nothing happens when it's set to open in Acrobat. I can view the file in "Preview in Thunderbird" and the file isn't corrupted as I can save to disk and then open in Acrobat.

I tried restarting TB in troubleshoot mode with add-ons disabled, but that did not solve.

Thanks for help!

PDF file attachments were working fine and now they don't. I get no error message, but nothing happens when it's set to open in Acrobat. I can view the file in "Preview in Thunderbird" and the file isn't corrupted as I can save to disk and then open in Acrobat. I tried restarting TB in troubleshoot mode with add-ons disabled, but that did not solve. Thanks for help!

Wšě wotmołwy (2)

nsolot
nsolot Prašer

BTW, .xlxs (excel) files open normally.

nsolot
nsolot Prašer

It is determined to be a problem/conflict with NordVPN and the "Threat Protection Pro". Disabling this Threat Protection Pro and files now open normally in TB.

Stajće prašenje

Dyrbiće so pola swojeho konta přizjewić, zo byšće na přinoški wotmołwił. Prošu stajće nowe prašenje, jeli hišće wužiwarske konto nimaće.