multi tag browsing not working

hello
WP No Base Permalink

not working
http://www.zoologi.pl/jaszczurka/
http://www.zoologi.pl/sauria/

http://www.zoologi.pl/jaszczurki+sauria/

btw i didnt remove tag base, but it removed that base automatically in settings

thanks for help/…

Paweł

https://ww.wp.xz.cn/plugins/wp-no-base-permalink/