Hi @Robert Smit ,
Welcome to our forum!
For our better research, please provide more information about your case:
- What's the version of your Outlook? (File > Office Account > About Outlook). Please make sure you have upgraded your Outlook to the latest version.
- Does this issue occur recently? If so, have you done any specific operations before that?
- And does this issue occur with the specific calendar event or all events?
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Looking up the invite in the outlookbox then the message is readable this counts also for new invites they are readable but when accepted and reopened in the calendar the screen is blanc and only shows attachments.
What do you mean about "Looking up the invite in the outlookbox"?
Considering the impact of some add ins, It is suggested that you try to start outlook in safe mode(win+R>type: outlook /safe) to check whether it works normally.
If this is still the issue in safe mode, it is suggested that you could try to create a new profile(Control Panel>Mail>Show Profiles>add) and add the account for testing to check if there are some differences.
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