Fatal error: Uncaught TypeError: join(): Argument #1 ($pieces) must be of type array, string given in /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/dev-plugin/rss_unlimited_categories_v0.7.6.6k.php:669
Stack trace:
#0 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/dev-plugin/rss_unlimited_categories_v0.7.6.6k.php(669): join()
#1 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/dev-plugin/rss_unlimited_categories_v0.7.6.6k.php(462): rssBuildSctSql()
#2 [internal function]: rss_uc_article_list()
#3 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/vendors/Textpattern/Tag/Registry.php(141): call_user_func()
#4 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(543): Textpattern\Tag\Registry->process()
#5 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(403): processTags()
#6 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/publish/taghandlers.php(5137): parse()
#7 [internal function]: variable()
#8 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/vendors/Textpattern/Tag/Registry.php(141): call_user_func()
#9 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(543): Textpattern\Tag\Registry->process()
#10 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(403): processTags()
#11 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_misc.php(3294): parse()
#12 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/publish/taghandlers.php(538): parse_form()
#13 [internal function]: output_form()
#14 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/vendors/Textpattern/Tag/Registry.php(141): call_user_func()
#15 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(543): Textpattern\Tag\Registry->process()
#16 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(403): processTags()
#17 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/publish/taghandlers.php(4478): parse()
#18 [internal function]: if_custom_field()
#19 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/vendors/Textpattern/Tag/Registry.php(141): call_user_func()
#20 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(543): Textpattern\Tag\Registry->process()
#21 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(403): processTags()
#22 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_misc.php(3294): parse()
#23 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/publish/taghandlers.php(538): parse_form()
#24 [internal function]: output_form()
#25 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/vendors/Textpattern/Tag/Registry.php(141): call_user_func()
#26 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(543): Textpattern\Tag\Registry->process()
#27 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(403): processTags()
#28 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/publish/taghandlers.php(2987): parse()
#29 [internal function]: txp_sandbox()
#30 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/vendors/Textpattern/Tag/Registry.php(141): call_user_func()
#31 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(543): Textpattern\Tag\Registry->process()
#32 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_publish.php(403): processTags()
#33 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/lib/txplib_misc.php(3368): parse()
#34 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/publish.php(740): parse_page()
#35 /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/index.php(74): textpattern()
#36 {main}
  thrown in /mnt/web121/e1/65/5946265/htdocs/e_speicher_2021/textpattern/dev-plugin/rss_unlimited_categories_v0.7.6.6k.php on line 669