!!Important!!
Last time I had this issue,it was being from another blockland file.The cause is,the system messed up both of the graphics and causing an error.But I do NOT think this is the case.
-The graphics setting blah blah didn't help
-I reinstalled blockland multiple times
-I failed to install a texture pack (Most likely to be the case)
-Then I deleted some of the texture pack's files to see if it can fixed...Im afraid not...
-I ran CC cleaner's bugs (to clear out what was going on)and it said blockland was missing a MUI cache or what ever and I fixed but it did not work.