Did you uncheck the resource pack through the Resource Pack section on the Settings tab?
#gg on my minecraft server
shy relic
Also if it said that it couldn't load at the beginning, it might have been uploaded in the wrong format. if you want you can dm me the file so i can check
if you mean you there aren't any resource packs uploaded atm, you can try Turning off the server > In server.properties remove everything after resource-pack= and then starting again