`string lower: -f1,2): unknown option` on install

[agirault]

Describe the bug

Error at installation

Steps to reproduce

curl -sL https://raw.githubusercontent.com/jorgebucaran/fisher/main/functions/fisher.fish | source \
&& fisher install jorgebucaran/fisher \
&& fisher install IlanCosman/tide@v6

Results

fisher install version 4.4.4
Fetching https://api.github.com/repos/jorgebucaran/fisher/tarball/HEAD
Installing jorgebucaran/fisher
           ~/.config/fish/functions/fisher.fish
           ~/.config/fish/completions/fisher.fish
Updated 1 plugin/s

fisher install version 4.4.4
Fetching https://api.github.com/repos/ilancosman/tide/tarball/v6
Installing ilancosman/tide@v6
           ~/.config/fish/functions/_tide_1_line_prompt.fish
           ~/.config/fish/functions/_tide_2_line_prompt.fish
           ~/.config/fish/functions/_tide_cache_variables.fish
           ~/.config/fish/functions/_tide_detect_os.fish
           ~/.config/fish/functions/_tide_find_and_remove.fish
           ~/.config/fish/functions/_tide_fish_colorize.fish
           ~/.config/fish/functions/_tide_item_aws.fish
           ~/.config/fish/functions/_tide_item_character.fish
           ~/.config/fish/functions/_tide_item_cmd_duration.fish
           ~/.config/fish/functions/_tide_item_context.fish
           ~/.config/fish/functions/_tide_item_crystal.fish
           ~/.config/fish/functions/_tide_item_direnv.fish
           ~/.config/fish/functions/_tide_item_distrobox.fish
           ~/.config/fish/functions/_tide_item_docker.fish
           ~/.config/fish/functions/_tide_item_elixir.fish
           ~/.config/fish/functions/_tide_item_gcloud.fish
           ~/.config/fish/functions/_tide_item_git.fish
           ~/.config/fish/functions/_tide_item_go.fish
           ~/.config/fish/functions/_tide_item_java.fish
           ~/.config/fish/functions/_tide_item_jobs.fish
           ~/.config/fish/functions/_tide_item_kubectl.fish
           ~/.config/fish/functions/_tide_item_nix_shell.fish
           ~/.config/fish/functions/_tide_item_node.fish
           ~/.config/fish/functions/_tide_item_os.fish
           ~/.config/fish/functions/_tide_item_php.fish
           ~/.config/fish/functions/_tide_item_private_mode.fish
           ~/.config/fish/functions/_tide_item_pulumi.fish
           ~/.config/fish/functions/_tide_item_python.fish
           ~/.config/fish/functions/_tide_item_ruby.fish
           ~/.config/fish/functions/_tide_item_rustc.fish
           ~/.config/fish/functions/_tide_item_shlvl.fish
           ~/.config/fish/functions/_tide_item_status.fish
           ~/.config/fish/functions/_tide_item_terraform.fish
           ~/.config/fish/functions/_tide_item_time.fish
           ~/.config/fish/functions/_tide_item_toolbox.fish
           ~/.config/fish/functions/_tide_item_vi_mode.fish
           ~/.config/fish/functions/_tide_parent_dirs.fish
           ~/.config/fish/functions/_tide_print_item.fish
           ~/.config/fish/functions/_tide_pwd.fish
           ~/.config/fish/functions/_tide_remove_unusable_items.fish
           ~/.config/fish/functions/_tide_sub_bug-report.fish
           ~/.config/fish/functions/_tide_sub_configure.fish
           ~/.config/fish/functions/_tide_sub_reload.fish
           ~/.config/fish/functions/fish_mode_prompt.fish
           ~/.config/fish/functions/fish_prompt.fish
           ~/.config/fish/functions/tide
           ~/.config/fish/functions/tide.fish
           ~/.config/fish/conf.d/_tide_init.fish
           ~/.config/fish/completions/tide.fish
string lower: -f1,2): unknown option

~/.config/fish/conf.d/_tide_init.fish (line 1):
string lower $_fisher_plugins
^
in command substitution
	called on line 11 of file ~/.config/fish/conf.d/_tide_init.fish
in function '_tide_init_install'
	called on line 1 of file ~/.config/fish/functions/fisher.fish
in event handler: handler for generic event “_tide_init_install”
	called on line 191 of file ~/.config/fish/functions/fisher.fish

Environment

Output of tide bug-report:

fish version: 3.6.4
tide version: 6.0.1
term: xterm-256color
os: Ubuntu 22.04
terminal emulator: NA
fish startup: 10.41 millis
fisher plugins: jorgebucaran/fisher ilancosman/tide@v6