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Noah Friesen
Participant
July 8, 2026
Answered

PDF opened in Acrobat through browser randomly gives errors when posting comments

When opening PDFs using Adobe Acrobat Online, I will try to post comments to the PDF and be met with the error “We were unable to post your comment, please try again.” This will continue until I close and reopen the PDF, then I can post comments again for a while until the error comes back.

      Amal Jaiswal
      Amal JaiswalCorrect answer
      Community Manager
      July 8, 2026

      ​

        

      Hi @Noah Friesen 

      Hope you are doing well and thanks for reaching out, and sorry to hear this is disrupting your review workflow. The intermittent "We were unable to post your comment, please try again" error in Acrobat Online is typically caused by a session timeout, a stale browser cache, or a temporary sync break between the browser and Adobe's cloud services. 

      Please try the steps below and see if that works:

      Clear your browser cache and cookies
      Clear your cache and cookies then close and relaunch the browser completely before reopening your PDF.

      Check your browser and extension setup

      • Make sure your browser is fully up to date.

      • Temporarily disable any browser extensions, particularly ad blockers, privacy shields.

      • If you're on a corporate network or VPN, try without it briefly to rule out a firewall blocking the comment sync calls.

      Try a different browser
      Acrobat Online works best on Chrome or Edge. If you're on Firefox or Safari, switching to Chrome is worth a quick test to see if the error persists.


      If none of the above helps, it would be really useful to know:

      • Which browser and version are you using?

      • Is this happening on one specific PDF or all files?

      • Are you on a work/corporate network?

      That'll help us narrow it down further and isolate the issue so we can fix it. 

       

      ~Amal

      View reply

      3 replies

      precise_Lily83ae
      Participant
      October 20, 2026

      Hi Noah, was this ever resolved? I’m curious because we’re also experiencing a similar issue.

      Translate
      PriyankaVishwakarma
      Community Manager
      PriyankaVishwakarmaCommunity Manager
      Community Manager
      October 21, 2026

      Hello @precise_Lily83ae, 

       

      Thank you for reaching out. I understand that you're able to add comments initially, but after some time Acrobat Online displays the message "We were unable to post your comment, please try again" until the PDF is closed and reopened. I can see how this would interrupt your review workflow, especially when collaborating on a document. 

       

      As an initial step, clear your browser's cache and cookies, then restart the browser and reopen the PDF. 

       

      You can also try opening the file in a private/incognito browsing window to rule out any browser-related settings or extensions. If you're using Firefox or Safari, try accessing the file in Chrome or Edge to see if the issue persists. 

       

      If you're still seeing the error, please help us with the following details: 

      • Which browser and version are you using? 
      • Does this occur with a specific PDF or across multiple files? 
      • Are you connected to a work or corporate network? 
      • Does the same behaviour occur in a private/incognito browsing session? 
      • Could you try opening the same PDF in the Acrobat desktop application and let us know whether the feature behaves the same way there? 

       

      These details will help us investigate further. We look forward to your update. 

       

      Regards, 

      Priyanka Vishwakarma 

      Translate
      Amal Jaiswal
      Community Manager
      Amal JaiswalCommunity ManagerCorrect answer
      Community Manager
      July 8, 2026

      ​

        

      Hi @Noah Friesen 

      Hope you are doing well and thanks for reaching out, and sorry to hear this is disrupting your review workflow. The intermittent "We were unable to post your comment, please try again" error in Acrobat Online is typically caused by a session timeout, a stale browser cache, or a temporary sync break between the browser and Adobe's cloud services. 

      Please try the steps below and see if that works:

      Clear your browser cache and cookies
      Clear your cache and cookies then close and relaunch the browser completely before reopening your PDF.

      Check your browser and extension setup

      • Make sure your browser is fully up to date.

      • Temporarily disable any browser extensions, particularly ad blockers, privacy shields.

      • If you're on a corporate network or VPN, try without it briefly to rule out a firewall blocking the comment sync calls.

      Try a different browser
      Acrobat Online works best on Chrome or Edge. If you're on Firefox or Safari, switching to Chrome is worth a quick test to see if the error persists.


      If none of the above helps, it would be really useful to know:

      • Which browser and version are you using?

      • Is this happening on one specific PDF or all files?

      • Are you on a work/corporate network?

      That'll help us narrow it down further and isolate the issue so we can fix it. 

       

      ~Amal

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