facing character encoding issue

I am using the plugin with latest version of wordpress and php7.2

i have recently changed DB engine to MyISAM to Innodb after that i am getting this error.

�;�pwN#r9��WRD�;DMDF ;˦�?J�,]H�h_�-�5IGr�ұ}�0���]F�[X9�^�S௙NBǧa�V4��x\��݉�L������~��˧O����3�����w�܈��+m�4�/J��S3��mOL�E�ȹ���O�,�\������z�Hw���DJ����ij_w�L�cY��%u�Q�����me�����^xuF�O�QF|:����>�H�5#B�p������h�H$��=��;���g���|O���6��ag�-�&I��~��mю�n�[�Q� ����Xÿ��jG�C1zu@��O#�B��@#�^������Ya�e�^+�O)�m�"/�rfu��ϳV�� ��F"�)7ی��I+(S������N�Qt�-hRO��k�o�̜�ʙ�gg�I { �*g���F�?�̚�� Q����#,��*͙���b�h�a-�q�ԧ3��^�&�EhS�灉D%��MU���岓 ��/Q+r���� �? G��'��2����$�΁��<�|kP����mY<"U�����i4��� x�}��"~m���կݼB��a�t֨)#�܊l4B;�=%��&ΕY�; &۩���{�ֱ�r���Wn�������d�ўR*��1�ˌfe=T�qbb���L�S�x�?A�X��{8�N���#�&WQ[�i*�7�J�̸�N*���+q�Do�C�9��07Qȃ��dK�7���_�2uCsջb��ޖt#���連���Ug�J�%1eY�>�iz�QYF��ƒۖ̇�Rj��L8;;>�LXD^�9�Ɏt5��Jb�� �&�.I�3P�b��F�0n�Hi?�B6����&F� ����~’6�u��eJ��mD� MR��:FU�!�dC~XJ+MJ�M�i Rܹx��ɫ�������p�|+���

getting error only with this plugin remaining plugins are working fine.

help me out with this issue.

Thanks