Add exception handling

utils.py

@@ -872,8 +872,13 @@ def is_artist(base_dir: str, nickname: str) -> bool:
                 return True
         return False
 
+    lines = []
+    try:
         with open(artists_file, 'r', encoding='utf-8') as fp_artists:
             lines = fp_artists.readlines()
+    except OSError:
+        print('EX: is_artist unable to read ' + artists_file)
+
     if len(lines) == 0:
         admin_name = get_config_param(base_dir, 'admin')
         if admin_name: