_luny

I uploaded a world on my server a few months ago and have been using it by joining with /world ul_<server name> and building stuff, but now I can't join it anymore? Im on 1.16.5 (like the backup i uploaded), and ive looked at some other people with similar issues. Someone said that the file name shouldn't have spaces in it and mine has some, but when the world did work i just had to replace them with underscores. i wanted to try and remove the spaces but i dont know how to access the file i uploaded, if thats even possible. the command itself (/world) doesnt auto complete? or maybe it was /w but ive tried that too and it just completes to the /whisper command. please help i had some really cool stuff on there and i want to be able to finish my builds hahaha