After the 4.0.0 update the :Ack command no longer finds strings that exists in files.

By the way; thanks for a great plugin!

Let me know if you need anymore info.

Environment:
OS: Ubuntu 16.04
Search executable: rg
vim:

NVIM v0.3.1
Build type: RelWithDebInfo
LuaJIT 2.0.4
Compilation: /usr/bin/x86_64-linux-gnu-gcc -g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -DDISABLE_LOG -Wdate-time -D_FORTIFY_SOURCE=2 -Wconversion -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -O2 -g -DMIN_LOG_LEVEL=3 -Og -g -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wvla -fstack-protector-strong -fdiagnostics-color=auto -Wno-array-bounds -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -DNVIM_UNIBI_HAS_VAR_FROM -I/build/neovim-xZey2V/neovim-0.3.1/build/config -I/build/neovim-xZey2V/neovim-0.3.1/src -I/usr/include -I/build/neovim-xZey2V/neovim-0.3.1/build/src/nvim/auto -I/build/neovim-xZey2V/neovim-0.3.1/build/include
Compiled by team+vim@tracker.debian.org

Features: +acl +iconv +jemalloc +tui
See ":help feature-compile"

system vimrc file: "$VIM/sysinit.vim"
fall-back for $VIM: "/usr/share/nvim"

Run :checkhealth for more info