Snap on Raspbian depreciated MongoDB, unable to upgrade

Hi team,
Rocket.Cgat is installed on RPi 4 and latest raspbian through SNAP. All runs for nearly a year and all fine, but since few weeks back I do receive this MongoDB 3.2 depreciate, please update…

I have tried all I was able to find but no luck. It seems that the snap is not update so I can’t make the upgrade literally.

Here is what IO have, please let me know if you need to know more to be able to recommend the best way to fix /(upgrade):

snap list
Name               Version    Rev   Tracking       Publisher    Notes
core               16-2.45.1  9440  latest/stable  canonical✓   core
rocketchat-server  1.3.2      1397  latest/stable  rocketchat✓  -


snap info rocketchat-server
name:      rocketchat-server
summary:   Group chat server for 100s,  installed in seconds.
publisher: Rocket.Chat (rocketchat✓)
store-url: https://snapcraft.io/rocketchat-server
contact:   https://open.rocket.chat/channel/ubuntu-snap
license:   unset
description: |
  Slack-like online chat server for your office, group or family.   Up and running in seconds.
  Supports file sharing, video conference, geolocation, and much more.   Web and mobile client.  
  MIT licensed Open Source project.   List of features at  https://rocket.chat/ ,  MIT licensed
  source code at https://github.com/RocketChat/Rocket.Chat , 24 x 7 community support and community
  server at https://open.rocket.chat/
commands:
  - rocketchat-server.backupdb
  - rocketchat-server.initcaddy
  - rocketchat-server.mongo
  - rocketchat-server.restoredb
services:
  rocketchat-server.rocketchat-caddy: simple, enabled, inactive
  rocketchat-server.rocketchat-mongo: simple, enabled, active
  rocketchat-server:                  simple, enabled, active
snap-id:      wdBUbiEuMNHmAHLBCXQXOcXaOCvbWS1e
tracking:     latest/stable
refresh-date: 58 days ago, at 05:25 CEST
channels:
  latest/stable:    1.3.2 2020-05-17 (1397) 187MB -
  latest/candidate: 1.3.2 2020-02-11 (1397) 187MB -
  latest/beta:      1.3.2 2020-02-11 (1397) 187MB -
  latest/edge:      1.3.2 2019-08-24 (1397) 187MB -
installed:          1.3.2            (1397) 187MB -



snap refresh rocketchat-server --channel=stable/migrate-mongo3.4
error: requested a non-existing branch on latest/stable for snap "rocketchat-server":
       migrate-mongo3.4


sudo snap run rocketchat-server.mongo
ERROR: ld.so: object '/usr/lib/arm-linux-gnueabihf/libarmmem-${PLATFORM}.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/arm-linux-gnueabihf/libarmmem-${PLATFORM}.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/usr/lib/arm-linux-gnueabihf/libarmmem-${PLATFORM}.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.
MongoDB shell version: 3.2.15
connecting to: test
Server has startup warnings: 
2020-07-14T09:18:21.547+0200 I CONTROL  [initandlisten] 
2020-07-14T09:18:21.548+0200 I CONTROL  [initandlisten] ** WARNING: This 32-bit MongoDB binary is deprecated
2020-07-14T09:18:21.548+0200 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2020-07-14T09:18:21.548+0200 I CONTROL  [initandlisten] 
2020-07-14T09:18:21.548+0200 I CONTROL  [initandlisten] 
2020-07-14T09:18:21.549+0200 I CONTROL  [initandlisten] ** NOTE: This is a 32 bit MongoDB binary.
2020-07-14T09:18:21.549+0200 I CONTROL  [initandlisten] **       32 bit builds are limited to less than 2GB of data (or less with --journal).
2020-07-14T09:18:21.549+0200 I CONTROL  [initandlisten] **       See http://dochub.mongodb.org/core/32bit
2020-07-14T09:18:21.550+0200 I CONTROL  [initandlisten] 
rs0:PRIMARY> db.adminCommand ({getParameter: 1, featureCompatibilityVersion: 1})
{ "ok" : 0, "errmsg" : "no option found to get" }

Perhaps there is a simple fix, but I honestly have no idea how to proceed. Thanks a lot.