Clearing cache is the first thing I've done, additional use browser that doesn't store cache which is incognito.... But I have tried it in all browsers and cleared the cache and when I check from the server itself the same error comes out.... I think I will have to rebuild with the modification you suggest in your first comment because the official version does not work for me.
apart from compiling the code (./gradlew assemble)
you must add the schema/changelog-6.6.xml file.
and change the schema/changelog-master.xml file to the one you have modified.
ready I have done it, now it works...
Clearing cache is the first thing I've done, additional use browser that doesn't store cache which is incognito.... But I have tried it in all browsers and cleared the cache and when I check from the server itself the same error comes out.... I think I will have to rebuild with the modification you suggest in your first comment because the official version does not work for me.