There are some problems with your database. Normally it is safe to try to fix these problems automatically however if your community is large, you may want to run the necessary queries manually. If so, the queries to run are:

ALTER TABLE `convert_app_sessions` CHANGE COLUMN `session_app_data` `session_app_data` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT 'Session Data containing rows converted, completed steps, etc.';

ALTER TABLE `cjmenu_groups` CHANGE COLUMN `group_extra` `group_extra` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';

ALTER TABLE `sdmyplaces_categories` CHANGE COLUMN `category_custom_fields` `category_custom_fields` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `category_tags_predefined` `category_tags_predefined` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';

ALTER TABLE `sdmyplaces_custom_fields` CHANGE COLUMN `cf_content` `cf_content` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `cf_input_format` `cf_input_format` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `cf_format` `cf_format` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';

UPDATE `sdmyplaces_places` SET `place_start_lat`=0 WHERE `place_start_lat` IS NULL;

UPDATE `sdmyplaces_places` SET `place_start_lon`=0 WHERE `place_start_lon` IS NULL;

UPDATE `sdmyplaces_places` SET `place_end_lat`=0 WHERE `place_end_lat` IS NULL;

UPDATE `sdmyplaces_places` SET `place_end_lon`=0 WHERE `place_end_lon` IS NULL;

ALTER TABLE `sdmyplaces_places` CHANGE COLUMN `place_votes` `place_votes` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `place_description` `place_description` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `place_data` `place_data` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `place_start_lat` `place_start_lat` DECIMAL (20,14) NOT NULL DEFAULT 0 COMMENT '', CHANGE COLUMN `place_start_lon` `place_start_lon` DECIMAL (20,14) NOT NULL DEFAULT 0 COMMENT '', CHANGE COLUMN `place_end_lat` `place_end_lat` DECIMAL (20,14) NOT NULL DEFAULT 0 COMMENT '', CHANGE COLUMN `place_end_lon` `place_end_lon` DECIMAL (20,14) NOT NULL DEFAULT 0 COMMENT '';

ALTER TABLE `sdmyplaces_comments` CHANGE COLUMN `comment_text` `comment_text` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';

ALTER TABLE `sdmyplaces_reviews` CHANGE COLUMN `review_text` `review_text` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `review_votes_data` `review_votes_data` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';

ALTER TABLE `sdmyplaces_places_images` CHANGE COLUMN `image_no_watermark` `image_no_watermark` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `image_thumb` `image_thumb` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';

ALTER TABLE `sdmyplaces_imports` CHANGE COLUMN `import_error_message` `import_error_message` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';

ALTER TABLE `sdmyplaces_import_files` CHANGE COLUMN `file_location` `file_location` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '', CHANGE COLUMN `file_data` `file_data` MEDIUMTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '';