Protonvpn install error

$ yay -S protonvpn
:: There are 2 providers available for protonvpn:
:: Repository AUR
    1) protonvpn 2) openvpn-protonvpn

Enter a number (default=1):
==>
:: Checking for conflicts...
:: Checking for inner conflicts...
[Aur:5]  python-proton-client-0.7.1-1  python-protonvpn-nm-lib-3.11.0-1  protonvpn-cli-3.12.0-2  protonvpn-gui-1.10.0-1  protonvpn-1.0.0-2

  5 python-proton-client                     (Build Files Exist)
  4 python-protonvpn-nm-lib                  (Build Files Exist)
  3 protonvpn-cli                            (Build Files Exist)
  2 protonvpn-gui                            (Build Files Exist)
  1 protonvpn                                (Build Files Exist)
==> Packages to cleanBuild?
==> [N]one [A]ll [Ab]ort [I]nstalled [No]tInstalled or (1 2 3, 1-3, ^4)
==> A
:: Deleting (1/5): /home/carlos/.cache/yay/python-proton-client
:: Deleting (2/5): /home/carlos/.cache/yay/python-protonvpn-nm-lib
:: Deleting (3/5): /home/carlos/.cache/yay/protonvpn-cli
:: Deleting (4/5): /home/carlos/.cache/yay/protonvpn-gui
:: Deleting (5/5): /home/carlos/.cache/yay/protonvpn
:: (1/5) Downloaded PKGBUILD: protonvpn
:: (2/5) Downloaded PKGBUILD: python-proton-client
:: (3/5) Downloaded PKGBUILD: python-protonvpn-nm-lib
:: (4/5) Downloaded PKGBUILD: protonvpn-gui
:: (5/5) Downloaded PKGBUILD: protonvpn-cli
  5 python-proton-client                     (Build Files Exist)
  4 python-protonvpn-nm-lib                  (Build Files Exist)
  3 protonvpn-cli                            (Build Files Exist)
  2 protonvpn-gui                            (Build Files Exist)
  1 protonvpn                                (Build Files Exist)
==> Diffs to show?
==> [N]one [A]ll [Ab]ort [I]nstalled [No]tInstalled or (1 2 3, 1-3, ^4)
==> n
:: (1/5) Parsing SRCINFO: python-proton-client
:: (2/5) Parsing SRCINFO: python-protonvpn-nm-lib
:: (3/5) Parsing SRCINFO: protonvpn-cli
:: (4/5) Parsing SRCINFO: protonvpn-gui
:: (5/5) Parsing SRCINFO: protonvpn
==> Making package: protonvpn 1.0.0-2 (Sat 11 Jun 2022 12:18:04 AM -04)
==> Retrieving sources...
==> Making package: python-protonvpn-nm-lib 3.11.0-1 (Sat 11 Jun 2022 12:18:04 AM -04)
==> Retrieving sources...
==> Making package: protonvpn-cli 3.12.0-2 (Sat 11 Jun 2022 12:18:04 AM -04)
==> Making package: protonvpn-gui 1.10.0-1 (Sat 11 Jun 2022 12:18:04 AM -04)
==> Retrieving sources...
==> Retrieving sources...
==> Making package: python-proton-client 0.7.1-1 (Sat 11 Jun 2022 12:18:04 AM -04)
  -> Downloading 3.11.0.tar.gz...
==> Retrieving sources...
  -> Downloading 3.12.0.tar.gz...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dloa  -> Downloading 1.10.0.tar.gz...
d  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0     -> Downloading 0.7.1.tar.gz...
 0     0      0      0 --:--:-- --:--:-- --:--:--     0  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:00:05 --:--:--     0
  0     0    0     0    0     0      0      0 --:--:--  0:00:05 --:--:--     0
  0     0    0     0    0     0      0      0 --:--:--  0:00:05 --:--:--     0
  0     0    0     0    0     0      0      0 --:--:--  0:00:05 --:--:--     0
100 48598    0 48598    0     0   4429      0 --:--:--  0:00:10 --:--:-- 10987
100  107k  100  107k    0     0  10020      0  0:00:10  0:00:10 -==> Validating source files with sha256sums...
-:--:-- 24780
    3.12.0.tar.gz ... ==> Validating source files with sha256sums...
Passed
    3.11.0.tar.gz ... Passed
100 3939k    0 3939k    0     0   347k      0 --:--:--  0:00:11 --:--:--  817k
==> Validating source files with sha256sums...
    1.10.0.tar.gz ... Passed
100 1461k    0 1461k    0     0   123k      0 --:--:--  0:00:11 --:--:--  335k
==> Validating source files with sha256sums...
    0.7.1.tar.gz ... Passed
==> Making package: python-proton-client 0.7.1-1 (Sat 11 Jun 2022 12:18:16 AM -04)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Found 0.7.1.tar.gz
==> Validating source files with sha256sums...
    0.7.1.tar.gz ... Passed
==> Removing existing $srcdir/ directory...
==> Extracting sources...
  -> Extracting 0.7.1.tar.gz with bsdtar
==> Sources are ready.
==> Making package: python-proton-client 0.7.1-1 (Sat 11 Jun 2022 12:18:18 AM -04)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> WARNING: Using existing $srcdir/ tree
==> Starting build()...
Traceback (most recent call last):
  File "setup.py", line 4, in <module>
    from proton.constants import VERSION
  File "/home/foo/.cache/yay/python-proton-client/src/proton-python-client-0.7.1/proton/__init__.py", line 1, in <module>
    from .api import Session # noqa
  File "/home/foo/.cache/yay/python-proton-client/src/proton-python-client-0.7.1/proton/api.py", line 247
    exc_type, *_ = sys.exc_info()
              ^
SyntaxError: invalid syntax
==> ERROR: A failure occurred in build().
    Aborting...
 -> error making: python-proton-client