developer ignore me since 4 stupid months but he is active on the spigot and was actvie 19h ago
Writing in discussion meaby you will get announce about review ;)

Very nice Developer when I was having issues he helped! I am currently using this in my SkyBlock Server!

I have downloaded other plugins from this author he does a great job and updates his plugins quickly!

[16:47:24 ERROR]: Could not load 'plugins/GUI9TrashCan.jar' in folder 'plugins': uses the space-character (0x20) in its name
[16:47:25 ERROR]: [STDERR] [org.bukkit.craftbukkit.v1_19_R1.legacy.CraftLegacy] Initializing Legacy Material Support. Unless you have legacy plugins and/or data this is a bug!

Plugin will not load on server due to
"Could not load 'plugins/GUI 9.jar' in folder 'plugins': uses the space-character (0x20) in its name"

I know it says not to leave bad reviews without searching for a solution, but it appears that this was brought to your attention 2 months ago and is still not fixed according to the other review.

Plugin works very well.
Btw you must fix error:
"Could not load 'plugins/GUI 9.jar' in folder 'plugins': uses the space-character (0x20) in its name" :)