Error message

• Deprecated function: explode(): Passing null to parameter #2 ($string) of type string is deprecated in etype_e_editions() (line 447 of sites/all/modules/etype/etype.module).
• Deprecated function: explode(): Passing null to parameter #2 ($string) of type string is deprecated in etype_e_editions() (line 448 of sites/all/modules/etype/etype.module).