[5.2] Tried to add an item to batch without mesh

[maruhe]

Application Version happens more oftain since 5.2 sometimes I also got similar in 4.8 logs are created with 5.3 xmas alpha, still the same in 5.3 beta

Platform Windows 10

Steps to Reproduce I really don't know cura log.zip I have a may complex multipart-model with custom support-objects and objects to block support error happenes some kind of random while I oftain can fix it by moving the model or restarting Cura in the cura.log_supershort you see I was able to slice once, than I did some little changes in settings retraction and a support-parameter was changed here I think and then I get the error (after 20 minutes of sclicing) sometimes it's enough to change a switch like 'G90 influences extruder' in ArcWelder - so a setting that changes nothing for cura the other 2 log-files contain more tries and may different errors

I can send you the model and profile on a direct channel, just I don't like to publish it

Actual Results slicing stopps without a detailed error message and shows the suggestion to report a bug