It looks like this might work:
https://forums.parallels.com/threads/kernel-5-0-3.346841/
From @(GalaxyMaster):
The only module that is failing with the latest Parallels Tools (14.1.3) is prl_fs and the fix is trivial:
	Code:
	diff -puNr parallels.orig/prl_fs/SharedFolders/Guest/Linux/prl_fs/super.c parallels/prl_fs/SharedFolders/Guest/Linux/prl_fs/super.c
--- parallels.orig/prl_fs/SharedFolders/Guest/Linux/prl_fs/super.c    2018-09-07 13:15:08.000000000 +0000
+++ parallels/prl_fs/SharedFolders/Guest/Linux/prl_fs/super.c    2019-04-02 06:45:15.675125322 +0000
@@ -116,11 +116,11 @@ static int prlfs_remount(struct super_bl
 {
     int ret = 0;
     DPRINTK("ENTER\n");
-    if ( (!((*flags) & MS_RDONLY) && PRLFS_SB(sb)->readonly) ||
-           ((*flags) & MS_MANDLOCK) )
+    if ( (!((*flags) & SB_RDONLY) && PRLFS_SB(sb)->readonly) ||
+           ((*flags) & SB_MANDLOCK) )
             ret = -EINVAL;
 
-    *flags |= MS_SYNCHRONOUS; /* silently don't drop sync flag */
+    *flags |= SB_SYNCHRONOUS; /* silently don't drop sync flag */
     DPRINTK("EXIT returning %d\n", ret);
     return ret;
 }
@@ -270,7 +270,7 @@ static int prlfs_fill_super(struct super
     sb->s_maxbytes = MAX_LFS_FILESIZE;
     sb->s_blocksize = PAGE_SIZE;
     sb->s_blocksize_bits = PAGE_SHIFT;
-    sb->s_flags |= MS_NOATIME | MS_SYNCHRONOUS;
+    sb->s_flags |= SB_NOATIME | SB_SYNCHRONOUS;
     sb->s_magic = PRLFS_MAGIC;
     sb->s_op = &prlfs_super_ops;
     PRLFS_ALLOC_SB_INFO(sb);
 Steps: