my server wont start after i switched it to 1.17.1

[Solaratis]

ok so about a day ago i added the 2 plugins (shopkeepers) and (Custom drops) shopkeepers worked fine but custom drops isnt
when i start my server it immediatly shuts down and doesnt let me join or anyone else
i switched it to 1.17.1 for the custom drops to work 

What should i do??
SolarsPitPVP.minehut.gg

[Solaratis]

also it says theres an "internal server connection error" 
 

[Eltschu]

Yo, im rly sorry but this happened to me too in the past. Your server broke. You need to reset and delete all plugin files. Hope you go well and make it work<3

Edited September 12, 2022 by Eltschu
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[SWOEN]

You don't need to reset and delete all files, there could be some other causes. 

1. Your server can't handle 1.17 (because of new items and world generation)
2. Your plugins aren't made for 1.17 which causes it to crash (you can try to disable all plugins one-by-one to find out which one causes the problem, or just update all of them)
3. Your server indeed broke, just try to update all plugin files and/or delete them.