Minecraft Forge installation error "There was an exception running task" PLEASE HELP!

[L3n4_PL]

So, i have an minecraft equestrian server with mods. My friend decided to download forge and mods to play with me.

1. she opened the forge file with java but it didn't work, we downloaded jarfix and it worked
2. Forge was downloading and then a error message popped up

"There was an exception of running task:java.lang.ClassCastException: com.google.gsonJsonArray cannot be cast to com.google.gsonJsonObject"

We deleted forge and java and installed them back, it still didn't work !

PLEASE HELP!

[L3n4_PL]

https://media.discordapp.net/attachments/928198342285070338/942718924145958912/IMG_20220214_104704072.jpg?width=1728&height=1296 thats how it looks on my friends laptop.

[L3n4_PL]

1 hour ago, diesieben07 said:

Post the debug.log.

What's that? (sorry i don't know ;-; )

[L3n4_PL]

file:///C:/Users/Lena/Downloads/IMG_20220215_202715742.jpg  is this a log file?  My Friend installed (2nd time i think) forge again and took these photos
file:///C:/Users/Lena/Downloads/IMG_20220215_202712341.jpg
file:///C:/Users/Lena/Downloads/IMG_20220215_202713618.jpg