here's infocopy info: deferred.fsh: deferred.fsh: Fragment shader failed to compile with the following errors:
ERROR: 0:57: error(#132) Syntax error: "sample" parse error
ERROR: error(#273) 1 compilation errors. No code generated

when i click apply, it just says "the shaderpack failed to load! please report the error to the shader developer"

Which shader pack were you trying to load when the issue occured, and does the same issue occur with other shader packs?

A full log file could also help with finding out more about the problem

Usually this is found at .minecraft/logs/latest.log. If you are not sure how to find .minecraft, please see this article: https://minecraft.wiki/w/.minecraft#Locating_.minecraft. Please do not upload a compressed (.log.gz) file, they are very difficult for us to read when viewing issue reports. The log file instantly tells us important information like the versions of any other installed mods or if there are errors so it is very very important that you include it in your report.