Problem with sponsor changes

I have a problem with changing sponsors and players. Anyone able to help me?
The problem that is showing to me is:

### WordPress Environment ###

Home URL: https://www.stalmielec.eu
Site URL: https://www.stalmielec.eu
WPCM Version: 2.2.5
WP Version: 5.8
WP Multisite: ?
WP Memory Limit: 40 MB - We recommend setting memory to at least 64MB. See: Increasing memory allocated to PHP
WP Debug Mode: ?
Language: pl_PL

### Server Environment ###

Server Info: LiteSpeed
PHP Version: 7.2.34
PHP Post Max Size: 256 MB
PHP Time Limit: 300
PHP Max Input Vars: 10000
MySQL Version: 10.3.29
Max Upload Size: 256 MB
Default Timezone is UTC: ?

### Active Plugins (9) ###

Redux: 
Klasyczny Edytor: 
Limit Login Attempts Reloaded: 
LiteSpeed Cache: 
Loco Translate: 
Master Elements: 
Shortcodes Ultimate: 
Yoast SEO: 
WP Club Manager: 

### Taxonomies ###

Teams: ita tools stal mielec (ita-tools-stal-mielec)
Seasons: 2020/2021 (2020-2021)
2021/2022 (2021-2022)

Competitions: 1 liga kobiet (1-liga-kobiet)

### Theme ###

Name: Sport Club
Version: 1.3
Author URL: https://themnific.com/
Child Theme: ?
WP Club Manager Support: ?

### WP Club Manager Settings ###

Preset Sport: volleyball
Default Club: ITA TOOLS Stal Mielec

### Templates ###

Overrides: sport-club/wpclubmanager/content-single-match.php
sport-club/wpclubmanager/content-widget-fixtures.php version 2.0.0 is out of date. The core version is 2.2.5
sport-club/wpclubmanager/layout/sidebar.php
sport-club/wpclubmanager/layout/wrapper-start.php

The page I need help with: [log in to see the link]