P: crashes upon first access to Map module after Import

This thread is being merged into an existing authoritative thread for better tracking and response. Please review the official answer (if any) in the second post on the thread for more information. 

I checked your crash bucket and this thread will be the correct one to follow for a fix. 

When shifting module to Map og Web, LR Classical, running on iMac, crashes. After restart you change module. Has been a problem for some months now.

Good. Adobe employee Rikk Flohr indicates that crash logs have been identified and attached to this bug report.

I did, as reported elsewhere, get a 'fix' from Adobe, which worked perfectly the first time, but every one subsequent to that the problem happened again every time, even on newly created catalogues. All crash logs have been submitted to Adobe for investigation.

This crash is a known issue and the team has a bug logged for it. 

Here's a similar report but with the Web module rather than the Map module:

https://feedback.photoshop.com/conversations/lightroom-classic/lightroom-classic-102-crashes-on-switch-to-web-module/606e5ad61c4253634859cb27

This sounds very similar to another report about LR crashing after the first access to the Map module after importing images:

https://feedback.photoshop.com/conversations/lightroom-classic/lightroom-classic-crashes-upon-first-access-to-map-module-after-import/60686e00439e980adff75d76?commentId=606bfd50740aa414da723983 

Make sure you submit the crash logs to Adobe when asked.  An Adobe employee should come by here sooner and later and may ask you privately for your email address to find the crash logs.

When I switch to the web module for the first time after importing some images, Lr Classic either crashes or displays the message "Error initializing web module." If I quit and restart, it generally works the second time. Running MacOS 11.2.3.

BTW, annoying that you can't select the build # in the About box, which would make it easy to paste it in here...

I am unable to replicate this behavior on 10.15.7 with Lightroom 10.  However, I was able to locate crash logs for Brett. I have asked the team to look into this. 

@PeterRussell found that his catalog very quickly re-corrupted itself and the problem recurred. I have therefore removed the Correct Answer designation to this fix. We are hoping that Adobe engineering was able to find our crash dumps and are able to analyze the problem. Thanks.