Error on updating post

When i try to update the post i get these errors

Warning: preg_match_all() expects parameter 2 to be string, array given in /home/$/public_html/$/wp-includes/formatting.php on line 4209

Warning: mysql_real_escape_string() expects parameter 1 to be string, array given in /home/$/public_html/$/wp-includes/wp-db.php on line 1094

Warning: Cannot modify header information – headers already sent by (output started at /home/$/public_html/$/wp-includes/formatting.php:4209) in /home/$/public_html/$/wp-admin/post.php on line 235

Warning: Cannot modify header information – headers already sent by (output started at /home/$/public_html/$/wp-includes/formatting.php:4209) in /home/$/public_html/$/wp-includes/pluggable.php on line 1196

this is the template that is giving errors

[Tagline]
type = text
size = 35
label = (Shows up On Adventure List – Under the Adventure Title)

[Excerpt]
type = textarea
rows = 4
cols = 40
label = (Shows up On Adventure List – Under the Adventure Tagline)

[Blurb]
type = textarea
rows = 4
cols = 40
label = What is the blurb for this adventure? (Short description for sidebar.)

[Tag]
type = text
size =35
label = What is the tag that corresponds to the trip posts? (case sensitive)

[Book Now Title]
type = text
label = What’s the corresponding “Book Now” text for this adventure?

[Icon]
type = file
mediaLibrary = true
label = Icon image
blank = false

i did some debugging and i saw the blurb is being send as an array, not as string but for now i’m not sure on how to fix the issue

https://ww.wp.xz.cn/plugins/custom-field-template/